本文以现代汉语中高频使用的语气词“哈”为研究对象，“哈”在缓和语气、增强互动性方面具有独特作用，其灵活性与语境依赖性对汉语二语教学形成显著挑战。因此，本文通过语料分析、语用功能考察及历时演变研究，探讨其在不同语境中的语法功能与交际价值，同时结合对外汉语教学实践，为语气词“哈”二语教学提供理论参考与实践建议。

This paper focuses on the high-frequency modal particle "Ha" in modern Chinese, which plays a unique role in mitigating tone and enhancing interactivity. Its flexibility and context-dependency pose significant challenges in teaching Chinese as a second language. Therefore, through corpus analysis, pragmatic function investigation, and diachronic evolution research, this study explores the grammatical functions and communicative values of "Ha" in different contexts. Furthermore, combining practical teaching experience in Teaching Chinese as a Foreign Language , it provides theoretical references and practical suggestions for the instruction of the modal particle "Ha" in second language acquisition.